Titer

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titer

[′tī·tər]
(chemistry)
The concentration in a solution of a dissolved substance as shown by titration.
The least amount or volume needed to give a desired result in titration.
The solidification point of hydrolyzed fatty acids.
(textiles)
The weight per unit length of yarn.
The number of filaments in reeled silk thread.

Titer

 

(in analytical chemistry), the concentration of a solution expressed as the amount (in grams) of a substance dissolved in 1 milliliter (ml) of solution or as the amount of any substance that reacts with 1 ml of the given solution. Accordingly, a distinction is made between the titer for a dissolved substance (for example, the titer of the solution of hydrochloric acid, THCI) and the titer for a substance to be determined (for example, the titer of the solution of hydrochloric acid for sodium hydroxide, THCI/NaOH). The titer is calculated from the formula T = P/V, where T is the titer of the solution in g/ml, P is the weight of the batch in g, and V is the volume of the measuring flask in ml. Solutions with a known titer, called standard solutions, are used in titrimetric analysis.


Titer

 

in immunochemical analysis, the maximum or optimum dilution of antigens, antibodies, or complement at which a positive reaction between antigens and antibodies can be recorded or the reaction of one or both components can be registered against a standard. In some cases, such as complement fixation, the maximum antigen concentration at which sensitized erythrocytes can still be lysed is taken as the antigen titer. Determination of the titer is useful in making a quick estimate of the activity of immune serums.

Three kinds of titration are used in immunochemical analysis. In one method, pipettes are used to add different amounts of the material being titrated to identical volumes of the solvent or for successive transfer of a mixture of the material and solvent to test tubes containing an identical quantity of solvent; in the latter case, equal volumes of the material, solvent, and mixture to be transferred are usually taken, which produces twofold dilutions. The second method is similar, except that capillary tubes are used and the volumes are measured from the number of drops. Glass loops capable of holding strictly standard volumes of liquid are used in automatic titration.

N. A. DORFMAN


Titer

 

(titre), in the textile industry, a number used to rate the thickness of fibers and yarns (chiefly silk). The titer is expressed as the product of the cross-sectional area of a fiber or yarn and the density of its material (or as the ratio of the weight of a fiber or yarn to the length). The titer came into use in the 18th century. A unit known as a legal titer has been used since 1900; it is numerically equivalent to the weight in grams of a yarn 9 km in length. In the USSR the tex replaced the titer in 1956.

References in periodicals archive ?
1] Most patients had substantial recovery from the treatment of tumor resection and immunotherapy, which were associated with a decline of antibody titers.
05) antibody titer was observed in Group G for all strains of FMD and HS, in which selenium supplementation was given along with vaccination and treatment was started 75 days before parturition.
Mean values of antibody titers of each group were compared using one way analysis of variance (ANOVA) followed by Duncan Multiple Range Test (Steel et al.
Convalescent-phase plasma can be harvested for many months to a year after disease from patients surviving MERS-CoV infection, but plasma with a high antibody titer is only likely to be obtained during the first few months of convalescence from persons who had severe disease.
The specific antibody titer against Pasteurellamultocida increased with the increasing dose of Ivermectin as the highest GMT value was obtained at 600ug/kg dose level.
The Al(OH) gel 2 3 based HS vaccine induced anti-LPS-IHA antibody titer that reached at peak level (log2 declined gradually thereafter, reaching to level of log2 IHA antibody titer on 180 days post priming.
As per manufacturer's guidelines the rapid ICT test is interpreted as positive if antibody titers are greater than 30mIU/ml and negative if the titers are less than 30mIU/ml.
Children having raised antibody titers (Greater than 30 U/ml) were placed on a GFD for six months.
Table-11: Comparison of mean ELISA antibody Titers of IBD

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